Which of the following reactions is not oxidation-reduction reaction?

H^{⨁} + O H^{⊝} \to H_{2} O

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\frac{1}{2} H_{2} + \frac{1}{2} C l_{2} \to H C l

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C a C O_{3} \to C a O + C O_{2}

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A

and

C

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Solution

The correct option is D $A$ and $C$
The reactions are as follows:
$H^{⨁} + O H^{⊝} \to H_{2} O$
It is a neutralisation reaction.
$\frac{1}{2} H_{2} + \frac{1}{2} C l_{2} \to H C l$
It is a redox reaction.
$C a C O_{3} \to C a O + C O_{2}$
It is a decomposition reaction.

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